When it comes to working with epoxies, attention to detail in preparation and handling can make all the difference. Whether you’re using an epoxy for bonding, sealing, or coating, following proper procedures ensures optimalperformance, reliability, and a smoother application process. Here’s what you need to know to get the most out of your adhesive systems.
1. Start with a Thorough Premix
For all filled epoxy systems—typically two-part adhesives with Part A and Part B—it’s essential to premix each individual component before combining them. This step re-disperses any filler particles that may have settled during storage, ensuring consistency and performance. Even one-component filled systems benefit from a gentle mix before use. Think of this as “waking up” the formula to ensure it’s ready to perform as expected.
2. Precision Mixing is Critical
Once each component has been premixed, it’s time to combine them in the correct ratio. Use a gram scale and follow the recommended mix ratio found on the product’s technical data sheet. Always use a minimum of 2 grams of material—this helps promote a full and effective cure.
Accuracy matters. Each component’s weight should be within ±5% of the specified ratio to maintain the adhesive’s integrity. After weighing, mix the components thoroughly:
- 1–2 minutes clockwise
- 1–2 minutes counterclockwise
This dual-direction mixing approach promotes a truly homogeneous blend—critical for ensuring full polymerization and optimal adhesive strength.
3. Store Smart to Avoid Cross-Contamination
Proper storage habits help protect your materials and extend their shelf life. After weighing, immediately wipe the threads of each container and securely replace the caps. Be cautious: if the jars for Part A and Part B look similar, do not swap caps. Cross-contamination between components—even at the lid level—can trigger premature curing and make containers difficult (or impossible) to reopen.
4. Don’t Skip Safety and Cleanliness
Even though most EPO-TEK® epoxies are 100% solids systems (meaning they don’t emit vapors), best practices for lab safety still apply.
- Work in a well-ventilated area or under an exhaust hood.
- Wear latex or nitrile gloves at all times, and change them regularly.
- Clean your workspace frequently to reduce contamination risk.
- After handling materials, wash your hands thoroughly with soap and water.
5. Smart Cleanup Prevents Future Issues
To clean up tools or work surfaces, use acetone or IPA (isopropyl alcohol) with a lint-free rag or paper towel. Make sure to wipe away any residual solvent completely—leftover solvent can introduce contamination into your next mix or application.
In Summary:
Proper epoxy mixing and handling aren’t just best practices—they’re essential steps for ensuring performance, reliability, and safety. From premixing and weighing to hygiene and cleanup, following these simple guidelines can dramatically improve your results and protect your materials.
Want to dive deeper into epoxy usage or need a recommendation for your specific application? Contact our team at techserv@epotek.com.
